Uni i ed otatko ralkni



(Model.) 7.

E. STOGKWELL.

SAFE LOOK. 'No. 294,821. Patented Mar} 11, 1884.

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EMORY STOCKWVELL, OF STAMFORD, CONNECTICUT, ASSIGNOR TO THE YALE & TOW'NE MANUFACTURING COMPANY, OF SAME PLACE.

SAFE-LOCK.

SPECIFICATION formingpart of Letters Patent 294,821, dated March 11, 1884.

' Application filed January'i, 1 884. (Model) T0 ctZZ whom it may concern:

Be it known that I, EMORY STOOKWELL, of Stamford, in the county of Fairfield and State of Connecticut, have invented certain new and useful Improvements in Dial-Locks, of which the following is a specification, reference being had to the accompanying drawings, in-

which Figure 1 is a transverse section of a dial-lock on the line 1 1 of Fig. 3. Fig. 2 is a section on the line 2 2 of 1. Fig. 3 is a section on the line 3 3 of Fig. 1. Fig. 4 is a section on the line 4 4. of Fig. 1. Fig. 5 is a section on the line 2 2 of Fig. 1, showing a formal modification; and Fig. 6 is a similar section, showing another formal modification, in which one end bearing of the rotary fence-bearing is a hollow screwcap.

The object of my invention is to produce a dial-lock in which the ordinary rotating spindle and tumblers are used, and in which all the parts of the fence and bolt mechanism are rotary in their operation and are simple and compact in construction and arrangement with respect to one another, whereby, at minimum cost of production, I secure certainty of op-' eration and great durability without liability of the parts to get displaced. Thus I produce a lock in which all of the operative or moving parts have rotary motion whenever the lock is operated, either for looking or unlocking. This enables me to attain the minimum of re sistance and wear, and therefore the maximum of ease, certainty, and simplicity of movement.

One of the principal features of my improvements is a rotating bearing for a fence, which may consist of either a solid or hollow cylinder, er of any other suitable form of rotating journal or bearing. Such a bearing obviates the danger of sticking'of the fence, as it is known in practice, which sometimes seriously interferes with'the operations of locks of even the best types and most excellent workmanship, in which the fence-arbor is fixed. It also adds greatly to the security of the lock against picking. I have shown such a rotating bearing in my United States patent for an improved dial-lock of even date herewith; but have not therein claimed it, broadly, nor do I here, because I am aware that it is not new.

Referring now to the letters upon the drawings, A indicates a lock-case cast in one. piece, including the tumbler curb-holder B, although the form or construction of the case is not material. C indicates the dial-spindle, D the tumbler mechanism, E the rotary cam, and F the cap, all of ordinary construction.

G indicates the bolt-pivot, which is preferably igemovable, being a screw-bolt, as illustrated. 1

H indicates the rotary bolt, and I the rotary fence, which latter is provided with a balanced weight or wing, K, making it abalanced fence, although it need not necessarily be a balanced fence; but that is preferable. The bolt and fence are each provided with segmental gears L, which connect them together in operative relations, as illustrated.

M indicates the rotary bearing of the fence, on the lower end of which is, a gear-wheel, N, meshing with a corresponding gearwheel, O, on one face of the rotary cam, so that the rotation of the cam always causes the rotation of the rotary bearing of the fence.

In Fig. 2 I have shown the cylindrical bearing of the fence, provided with a joint-ed shaftbearing, P, one part of which is inserted in place, and afterward the other part, Q, which is provided with a screw-cap, is screwed to place, as well illustrated in Fig. 2. In Fig. 5, however, I have shown the rotary fence-bearing'as consisting of a hollow cylinder only, (which, however, might be a solid cylinder) held in place by a screw-cap, Q. This cap should fit loosely upon the end of the rotary bearing, so as not to interfere with its free rotation. In this instance the bearings of the rotary fence-bearing are directly in the sides of the lock-case, the screw-aperture B being of greater diameter than the bearing M, so as to accommodate the setting of the bearing in its.

which is a recess, U, to accommodate the gear- I 3. In a lock, the combination of rotary tumxvheel N. This construction enables the parts to be set very compactlyin the ease.

V indicates a stop, which is shown as a bolt or pin, but which might be any suitable stud or projection east on the wall of the look-ease, to limit the rotary movement of the lock-bolt in the direction for unlocking. The operation of the cams and tumblers in their relation to the fence is as usual. This construction of lock is very convenient for both hand-chang ing and key-changing tumblers.

Vhat I claim as new is- -1. In a lock, the combination, of a rotary fence-bearing;, a rotary fence, and a rotary bo1t, operating together, substantially as set forth.

2. A lock-case provided with raised block R, having a ledge, S, with a bolt-pivot aperture, and a recess beneath, substantially as set forth.

blers and cam, a rotary fence and bolt connected operativcly together, a rotary fencebearing, and means for rotating the bearing when the lock is operated, substantially as set forth.

I. In a dial-look, the combination of a rotary fence-bearing, a spindle for operating the tumblers, and mechanism. connecting or gearing the two together, so that whenever the spindle is rotated the fence-bearing must also rotate, substantially as described.

In testimony whereof I have hereunto subscribed my name this 29th day of December, A. I). 1883.

EMORY SIOCKXYELIJ.

.Vitnesses:

SOHUYLLR )IERR I'rr, GEO. E. amils. 

